All or Nothing Implement a public class named All that provides a single static method name orNothing. orNothing accepts two parameters: a count (int) and a boolean and returns an array of Items of size count. If the passed boolean is true you should return an array where all references refer to the same Item. If the passed boolean is false you should return an array where all references refer to different Item instances. You can create Item instances with an empty constructor: new Item().

All or Nothing Implement a public class named All that provides a single static method name orNothing. orNothing accepts two parameters: a count (int) and a boolean and returns an array of Items of size count. If the passed boolean is true you should return an array where all references refer to the same Item. If the passed boolean is false you should return an array where all references refer to different Item instances. You can create Item instances with an empty constructor: new Item().

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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c# programMake a class called Employees, with attributes Name, Gender, Experience, Salary and ID.Make a delegate called EligiblePromo. This delegate takes an employees object as a parameter and returns a boolean value indication whether or not the employee should be promoted.Make a PromoteEmployee() method that takes an arraylist of Employees and delegate of type EligiblePromo as parametersNB: PromoteEmployee() methos loops through each Employees object and passes it to the delegate(25)
public class TestStudents { public static void main(String[] args) { //2.2 Code given to you. Just use them. //create an array of Student objects. Student[] cisDept = new Student[4]; //Create and add 4 students, two undergraduates, two master students // add these students to the array //They are commented since you haven't added your code to Undergraduate, MasterStudent /* String[] theisCommittee = {"Tom", "Richard", "Gene"}; cisDept[0] = new MasterStudent("222", "Steve", "Jobs", "IST", "MS", 3.5, "How to make ipad smarter", "Jamie", theisCommittee); cisDept[1] = new Undergraduate("444", "Bill", "Gates", "CS", "BS", 3.0, "Erin", "Sally"); String[] theisCommittee2 = {"Jie", "Zoran", "Gene"}; cisDept[2] = new MasterStudent("333", "Amy", "Jobs", "CS", "MS", 3.8, "Study of Robots That can Perform", "Eduard",…
Java Program The assignment requires two classes. Put all classes in the same package. Class Employee Attributes (all private): id: String lastName: String firstName: String salary: int Methods: Parameterized constructor for initializing a new Employee instance Getters for all attributes toString method to display an Employee's attributes (See output of executable below) Executable Class Create an array of at least eight Employee objects. Be sure to use many with identical last names, but don't order them by name in the array. Create an ArrayList from the array. Sort the ArrayList first by last name and then by first name. Using the forEach method and a lambda expression, print all employees alphabetically sorted by name. Create a LinkedList from the ArrayList. Create an iterator capable of cycling both forward and backward through the LinkedList. Iterate forward through the LinkedList without generating any output. Then iterate backwards through the LinkedList to print…
1. Square Roots Create a class with a method that, given an integer, returns an array of double-precision floating point numbers (known in Java as double), each of which is a square root of a number between 2 and the parameter to the method. For example, if the parameter is 5, the method should return an array of 4 doubles, with approximate values 1.4142135623, 1.7320508075, 2.0, and 2.2360679774. Your method should check the validity of the parameter, and take appropriate action if the parameter is invalid. 2. Reading Files Create a class with a method that, given a string representing a file name, returns an integer with the number of characters in the file. For example, if the file has 10 characters, your method must return the number 10. 3. Main Class Create a class HW1.java with a main method that does both of the following: calls the method from part 1 with a random integer between 0 and 10, and prints each of the numbers in the result. The numbers should all be printed on the…
Write a class that represents a player in a game. The player should have a name, password,experience points, an inventory array of four strings, and a location x,y. Your class shouldhave mutator and accessor methods for all variables. For example: setName(), getName(). Itshould have a suitable display method. Mutators and accessors should be public but allvariables should be private. To implement get inventory, use string * getInv(); Use the scoperesolution operator to implement larger methods such as display(). Use in class methods forshorter methods such as setName(), getName(). (in C++)Example:void setName(string name){this->name = name;}string *getInv();...string* player::getInv(){return inventory;}Note that in the above method setName “this->” is required for disambiguation. If writtenvoid setName(string n){name = n;}“this->” is not required.Write a test program that creates three players and displays them.Example Output:This program generates three player objects and…
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Create a class Term. This class represents a term ofa polynomial such as 2x4 where 2 is coefficient and 4 isexponent of the term.Data members:- int coefficient int exponentCreate another class Polynomial. The internalrepresentation of a polynomial is an array of Terms. Thesize of this array should be fixed.Provide a constructor for this class that will set all termsof a polynomial object as zero (where coefficient is 0 andexponent is 0). Provide followingfunctions: setTerm(int, int) – Setting a term of a polynomialobject. Each successive call of this function shouldset next term of the polynomial object.It should do the following validations:- Whether the exponent of the term being set isalready used. Whether the array size limit is exceeded. Whether the exponent is negative.In all the cases it should not set the term and display anappropriate message. sort() – to arrange the terms in ascending order ofexponents. provide a function to print a polynomial object
Create a class called Employee with threeattributes: Name, Salary and Id. Make constructors, getters, setters, tostring, displayand compareTo methods. Write a method qsort(e) that will accept an array ofEmployees and sort the results by ID. Write a method bsearch(e, id) that will accept asorted array of Employees and use a binary searchalgorithm to find a specific employee by Id.In your test driver create an array with 10employees. Be sure to populate that data sothat the ids are in random order. Display the array, call qsort then display it again andcall the bsearch with a valid id and an invalid id.
Write a class named StockPrice. The class constructor should accept an array of stock prices as its argument. The class should have a method that returns the average of the stock prices. If any stock prices in the array is at least 300, the class should throw an IllegalArgumentException.
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Consider the Person class below: public class Person { private String name; private int age; public Person () { } public void setAge(int age) { this.age = age; } public void setName(String name) { name = name; } public int getAge() { return age; } public String getName() { return name; } } Create an object of type Person with name, John, and age 25. Create a one dimensional Array of Person objects, people, which can hold 100 Person objects: Write the sumAge method. It calculates the total age of all the Person objects in the people array. public static int sumAge(Person [] people) { }
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